Regulation of pneumatic-fan systems.



No. 759,245. PATENTED MAY 10, 1904 J. L. GREVELING.

REGULATION OF PNEUMATIC FANSYSTEMS.

APPLICATION FILED 0013,1901.

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110,759,245. I PATENTED MAY 10, 1904. J. L. CREVELING.

REGULATION OF PNEUMATIC FAN SYSTEMS.

APPLICATION FILED OUT. 3, 1901. N0 MODEL. 2 SHEETS-SHEET 2 11v V EN TOR.

UNITED STATES Patented May 10, 1904.

PATENT OFFICE.

JOHN L. OREVELING, OF NEIV YORK, N. Y., ASSIGNOR TO SAFETY OAR HEATING & LIGHTING COMPANY, A OORPORATI ON OF NEIV JERSEY.

REGULATION OF PNEUMATIC-FAN SYSTEMS.

SPECIFICATION forming part of Letters Patent No. 759,245, dated May 10, 1904.

Application filed October 3, 1901. Serial No. 77,372. NO model.)

To fI/ZZ 'LU/I/UIN/ it inn/7 concern:

Be it known that I, J OHN L. OnEvuLINe, a citizen of the United States, residing at the borough of Manhattan, city, county, and State of New York, have invented certain new and useful Improvements in the Regulation of PneumatieFan Systems, of which the following is a specification.

My invention relates to the regulation of pneumatic-fan systems, and has for its object to produce means whereby compressedair fans carried upon a train and in communication with an automatic or self-governed compressor upon the locomotive may be made to start when the speed of the train has lessened to a predetermined degree-as, for instance, live miles an hourand run during stops and while the train is moving at a very slow rate of speed, when of course the steam in the locomotive-boiler has a very low commercial value and might as well be operating an air-compressor as passing out through the safety-valve.

Except on very humid days fans are not ordinarily required in a car when going at a considerable speed, and when the locomotive is working at a fairly-high speed of course all steam taken from the boiler is of value.

In the accompanying drawings I have shown an apparatus in which one form of my invention is embodied, this form of the invention being shown because of its simplicity and reliability. This apparatus is so adjusted as to automatically turn off the fans at a predetermined speed of the train and turn them on again when the train slows down or steps.

In the drawings, Figure I is a broken-away side elevation of a car carrying an apparatus embodying my invention; and Fig. II is an enlarged detail view, partly in section, showing one form of centrifugal apparatus for governing the flow of compressed air to the fan system.

In the drawings, A represents a railroad-car carrying a suitable air-reservoir B, supplied with compressed air through a train-pipe a. This train-pipe a communicates with an aireompressor (not shown) provided with any usual automatic device for governing the How oi steam to the air-compressor by the pressure developed in the air-storage system. Leading from this reservoir is a suitable pipe 6, which communicates with a port 0 of a valve-casting O, Fig. II. This valve-casting O is provided with chambers (Z 0, the chamber 0 communicating with the port 0 and the chamber (Z communicating with a port f, which communicates with pipe g, leading to a pneumatically-driven fan it. A port 2 intervenes between the chambers (Z and 0. Ports 7' and 7: are adapted to form a by-pass to connect the chambers and c, and the Valve l, provided with a stem O, passing through the carfloor I), is adapted to control the by-pass, so that by opening the said valve the communication between the reservoir and the fan system may be maintained independently of the speed of the train.

The port 2' is closed by the valve p, provided with a stem 9, and normally held against its seat in the port by the spring 1'. A shaft 8 is hung in hangers L from the car-floor and is provided with a pulley u, receiving rotary motion by means of a belt 01' band e from a car-axle w. A centrifugal governor (/0, provided with a movable sleeve y, is adapted to impart longitudinal movement to the stem q of the valve, so that when the train is running at a speed above the predetermined rate the valve will be held firmly to its seat by the spring 9". IVhen the speed of the train di minishes, the centrifugal governor will open the valve, thereby permitting the influx of air through the port t to the fan system.

When the flow of air to the fans has sufliciently diminished the air-pressure in the airstorage system, the automatic regulator for the air-compressor will come into action and the steam from the locomotive-boiler which would otherwise escape through the safety valve will be utilized to drive the air-compressor and supply air to the storage system.

Having described my invention, what I claim, and desire to secure by Letters Patent, is

1. In a pneumatic-fan system for railwaytrains the combination of a pneumatic fan cari parts of the vehicle and operating as a funcried by the train, a source of air-supplytherefor and means controlled by the movement of the train for controlling the air-supply to the fan.

2. In a pneumatic-fan system for railwaycars the combination of a pneumatic fan, a source of air-supply therefor and means controlled by the movement of the car for controlling the air-supply to the fan.

3. In a pneumatic-fan system for cars or other vehicles, the combination of a pneumatic fan carried by the said vehicle, and means controlled by the movement of the vehicle for regulating the operation of the fan.

4. In a pneu1natic-fan system for trains or other vehicles, the combination of a pneumatic fan carried by the said vehicle, a compressedair tank for carrying an air-supply and automatic means under the control of the moving tion of the speed of the train Within certain limits for controlling the supply of air from the tank thereby controlling the operation of the fan.

5. In a pneumatic-fan system for cars, the combination of a pneumatic fan carried by the car, a source of compressed-air supply therefor and centrifugal means driven from the caraxle controlling the air-supply from the source to the fan.

In testimony whereof I have signed my name to this specification, in the presence oftWo subscribing Witnesses, this 12th day of September, 1901.

JOHN L. CREVELING.

\Vitnesses:

F. E. Knssrncnn, Gno. E. MORSE. 

